Preparing for Gastrointestinal Surgery: What You Need to Know and Frequently Asked Questions

1. General Preparation

Why is thorough preparation before gastrointestinal surgery important?

Thorough preparation before gastrointestinal surgery is essential to optimize surgical outcomes and minimize risks. The main goals of preoperative preparation are to improve the patient's overall health, identify and address potential risk factors, and prepare the patient psychologically for surgery [1]. Adequate preparation can help reduce the rate of complications, shorten hospital stays, and promote faster postoperative recovery [3].

What information should I provide to my doctor?

You should inform your doctor of all important medical information, including:

• Medical history: Chronic conditions such as diabetes, hypertension, heart disease, lung disease, previous surgeries, and allergies to medications, foods, or other substances [5].
• Current medications: Provide a complete list of all medications you are taking, including prescription and over-the-counter medications, vitamins, dietary supplements, herbal products, and contraceptives [5].
• Lifestyle habits: Smoking, alcohol consumption, and use of stimulants or recreational substances.
• Pregnancy: Whether you are pregnant or may be pregnant.

Is gastrointestinal surgery safe?

All surgical procedures carry certain risks. However, gastrointestinal surgery has become considerably safer thanks to advances in surgical techniques, anesthesia, and perioperative care [1]. Surgical safety depends on many factors, including the patient's overall health, the type of surgery, and the experience of the medical team. Your doctor will carefully assess your condition and discuss the specific risks with you before surgery [5].

2. Diet and Medications

Do I need to fast before surgery? How long should I fast?

You will need to fast before surgery. The specific fasting period will be determined by your doctor or healthcare professional. In general, patients are instructed to avoid solid foods for at least 6–8 hours and clear liquids for at least 2 hours before anesthesia [4]. This helps ensure that the stomach is empty and reduces the risk of aspiration of food or gastric contents into the lungs during anesthesia.

Can I drink water or other liquids before surgery?

In most cases, you may drink a small amount of plain water or clear liquids, such as sugar water or pulp-free fruit juice, up to 2 hours before surgery. Milk, pulpy orange juice, and carbonated beverages should not be consumed. Always follow the specific instructions provided by your doctor or nurse [4].

Should I continue taking my regular medications?

Whether you should continue or stop your regular medications must be discussed carefully with your surgeon and anesthesiologist. Some medications may need to be continued, while others may need to be stopped or have their doses adjusted.

Are there any medications I need to stop before surgery?

Certain medications are commonly discontinued before surgery to reduce the risk of complications:

• Medications that affect blood clotting: Aspirin, warfarin, clopidogrel, and others may need to be stopped several days to one week before surgery to reduce the risk of bleeding [5].
• Diabetes medications: The dose may need to be adjusted or the medication temporarily withheld on the day of surgery to prevent hypoglycemia [2].
• Nonsteroidal anti-inflammatory drugs (NSAIDs): Medications such as ibuprofen and naproxen may also affect blood clotting.
• Dietary supplements and herbal products: Some products, such as ginkgo biloba, ginseng, and vitamin E, may increase the risk of bleeding and may need to be discontinued before surgery [5].

Always consult your doctor about each medication or supplement you are taking and follow the instructions provided.

3. Physical and Psychological Preparation

Do I need any tests or examinations before surgery?

Yes. Your doctor will order preoperative tests to assess your overall health and identify any underlying conditions that could affect the surgery. Common tests may include blood tests, such as a complete blood count, liver and kidney function tests, and coagulation tests; an electrocardiogram (ECG); a chest X-ray; and other specialized tests depending on the type of surgery and your medical history [5].

How can I prepare myself psychologically for surgery?

Psychological preparation is important for reducing anxiety and stress. You can:

• Learn about the procedure: Ask your doctor about what will happen before, during, and after surgery.
• Talk to family members: Share your feelings with family and friends.
• Practice relaxation techniques: Try deep breathing, meditation, or listening to soothing music.
• Avoid reading unreliable or overly negative information.
• Trust your healthcare team.

Should I have a family member accompany me?

Yes. Having a family member accompany you is highly recommended. They can help with administrative procedures, listen to the doctor's instructions (as you may not remember everything when you are tired or anxious), and provide emotional support. After surgery, particularly during the early postoperative period, you may need assistance and care from family members.

4. After Discharge

What should I keep in mind after gastrointestinal surgery?

After discharge, the recovery process continues at home. You should:

• Follow your doctor's instructions: Take medications on schedule and attend follow-up appointments as recommended.
• Care for the surgical wound: Keep the wound clean and dry, and monitor for signs of infection such as swelling, warmth, redness, pain, or abnormal discharge.
• Follow an appropriate diet: Start with liquid, soft, and easily digestible foods, then gradually increase food consistency according to your doctor's instructions. Avoid foods that may cause irritation or indigestion.
• Engage in gentle physical activity: Begin walking gently as soon as possible to promote blood circulation and bowel function, while avoiding strenuous activities [4].
• Monitor for abnormal symptoms: Fever, abdominal pain, persistent nausea or vomiting, black stools, shortness of breath, or other unusual symptoms should be reported to your doctor promptly.

5. Frequently Asked Questions (FAQ)

• Can I eat and drink normally on the night before surgery? No. You must strictly follow your doctor's fasting instructions. In general, you will need to avoid solid foods for at least 6–8 hours and clear liquids for at least 2 hours before surgery to reduce the risk of aspiration complications [4].
• What if I have a cold or flu before the day of surgery? You should notify your doctor immediately. Your doctor may decide to postpone the surgery for safety reasons, as a respiratory infection may increase the risk of pulmonary complications during and after surgery [5].
• How soon after surgery can I return to normal activities? The time required to recover and return to normal activities depends on the type of surgery, your overall health, and your individual recovery process. Your doctor will provide specific advice. In general, you should avoid strenuous activities during the first few weeks and gradually increase your activity level [4].
• Can I shower before going to the hospital? Yes. You are generally encouraged to shower thoroughly with soap on the night before or early on the morning of surgery to reduce the risk of surgical site infection [4].
• Do I need to shave the surgical area? Routine shaving of the surgical area is no longer widely recommended because it may cause minor skin injuries and increase the risk of infection. If hair removal is necessary, healthcare professionals will generally use electric clippers immediately before surgery at the hospital [4].

6. Medical Review and References

Medical Consultant:

• Tran Phuong Lien, RN – Department of Gastrointestinal Surgery, University Medical Center Ho Chi Minh City

References

• [1] Grade, M. (2011). Standard perioperative management in gastrointestinal surgery. PMC. https://pmc.ncbi.nlm.nih.gov/articles/PMC3139268/pdf/cge-03-333.pdf. Accessed: 2025-12-11.
• [2] Mörgeli, R. (2017). Perioperative Management of Elderly Patients with .... PMC. https://pmc.ncbi.nlm.nih.gov/articles/PMC5407005/pdf/main.pdf. Accessed: 2025-12-11.
• [3] de AGUILAR-NASCIMENTO, J. E. (2024). PERIOPERATIVE CARE IN DIGESTIVE SURGERY: THE .... PMC. https://pmc.ncbi.nlm.nih.gov/articles/PMC10842018/pdf/bjms-67-e67041.pdf. Accessed: 2025-12-11.
• [4] Iqbal, U. (2019). Preoperative patient preparation in enhanced recovery .... PMC. https://pmc.ncbi.nlm.nih.gov/articles/PMC6646876/pdf/cureus-0011-00000004944.pdf. Accessed: 2025-12-11.
• [5] Zambouri, A. (2007). Preoperative evaluation and preparation for anesthesia .... PMC. https://pmc.ncbi.nlm.nih.gov/articles/PMC2120014/pdf/jca001-0051.pdf. Accessed: 2025-12-11.

The information above is provided for reference purposes only and does not constitute medical advice or recommendations. Please contact your doctor for detailed medical consultation.